Dr. Daniel Zenus is a fictitious inventor appearing in the "Be Careful What You Wish For" episode of The Scary Door. He is an extremely lazy inventor, who invents a robot to do all his scientific work, as well as his social obligations such as accompanying his wife and taking care of his son.

Only after his robot is given an award for his scientific achievements, Zenus realizes the wrongfulness of his ways. He therefore tells the robot to experience the tragic irony, and pops open a beer.